Bake oven



May 28, 1935. R. P. BOLLING BAKE ovEN Filed Oct. 13, 1934 3 Sheets-Sheetl Ill INVENTOR. ROBE/Pr PHIL/F Emu/vs ATTORNEYS.

May 28, 1935. R. P. BQLLING BAKE OVEN Filed Oct. 15, 1934 3 Sheets-Sheet2 F055 PHIL/P BOLLl/YG ATTORNEYS.

May 28, 1935. p, BQLLING 2,002,655

' BAKE OVEN Filed Oct. 13, 1954 3 Sh eets-Sheet 3 INVENTOR. 2

f5 foals; T P/ 1ILIP-BOLL #vs I J mmafw ATTORNEYS,

Patented May 28, 1935 *um'rsn ST E A N 'oFFIc 1 f 2 002 55 7 a l 1 K ERobert Philip Bolling, etroit, I Application Qctober 13,1934,Serialhlo.748,1e8t

'4 Claims. (014107-59) This invention has to do with bake ovens and itis directed particularly'to an oven of the .type equipped with a reeland used by commercial bakersibvens of the reel type are quite well 7known in the art, and a number of such ovens are shown in prior artpatents wherein a so-called reel is incorporated. The reels have shelvesupon which the goods to be baked are placed, such as bread, cakes,rolls, or other bake goods, which shelves arepivo-tally'mounted upon thereel and gravitate on the reel as the reel revolves. The difficulty withthis arrangement isthat the individual shelves are unstable inthat theyswing,

on the reel, and if thereel is jarred or caused to '3 vibrate for anyreason the several shelves are caused to swing, to the detriment of thebake goods thereon. For example, the shelves are loaded and unloadedasthe respective shelves are brought into alignment with an oven door,and in loading or unloading a shelf the reel may be jarred, andthe'other shelves remote from the loading door may be caused to rock, tothe detriment of the bake goods thereon, particularly where such bakegoods are such that such rocking of the shelves will cause the same tofall.

The principal object of this invention is the provision of a reel typeoven wherein the shelves swung thereon are individually stabilized. Thearrangement is such that the shelves remain substantially horizontalwhile the reel rotates, but they are heldfrom rocking relative to thereel incident to any force, impact or jar to whichthe reel orshelf oroven is subjected. A further ob-. ject of the invention is a provisionof the reel structure wherein the reel ends, which support the shelves,may be adjusted relative to each other, sothat opposite ends of theshelves carried by the reel may 'bebrought into a common plane, thusinsurin'g'that the shelves are in a horizontal plane from end to end.

In the accompanying drawings: Fig.'1 is a view of an oven equipped witha reel constructed in accordance with the invention withpart of the oven.wall cut away to illustrate the interior thereof.

Fig. 2 is an enlarged partial end view illustrating the. reel andstabilizing structure, looking substantially on line 2-2 of Fig. 3.

i Fig. 3 is an enlarged "sectional view taken substantially on line 3-4of Fig. 2. V

Fig. 41s a detailed view illustrating a shelf supporting member. i

"Fig. 5 is anenlarged end structure.

The oven'comprises an outer casing having end detail showing the reelthe-'position of the shelvsbn the reel, so that'a walls I and 2 and topandbottomwalls 3 and 4. There is, of course, a rear enclosing wall, andthe front wall 5 isprovlded withsuitable openable doors B'usedforloadingand unloading the-shelves. The-oven walls may and usually aresuitably in- 5 sulated or made of sheet metal linedwith ceramicmaterial, but this detail is not illustrated herein,

as this structure is not important from the standpoint of the presentinvention. 5 The oven shown is-a gas oven and'the gas is suppliedthrough a gas main! leading into amanifold B'c'cmnected by valvesfl toburne'r'pipes' l0 in the lower part of theoven." This arrangementislikewise shown more or less conventionally and is not particu larlypertinent to the invention}; Thesupply of gas may be controlled byatherin ostatic' element l l,' and a shaft]! -journaled in the: endwalls mayextend across the oven, the sarnebeing driven by suitable powermeans'such as an electric motor l3 operating'through suitable reductiongearing 20l or the like asfat l4, Such ovens may advantageously beequipped with an indicator I 5 having a rotary pointer thereon andoperated by suitable means (not shown) from the shaft [2 to indicate 25baker may know which shelf is in alignment with the doors.- i

The reel may comprise endplates or spiders keyed to the shaft l2 to bedriven thereby.- As shown herein the end structure may take the form'ofplate 20 with a hub 2 l keyed to the shaft I2 and with arms' 22 securedto the plate as by means of bolts 23. p A plate 26 may be positionedbetween each twoarnis and it has inclined ends for abutment againstopposite arms as shown in Fig.5, and this plate may be secured to theplate 20 in anadjustable manner by a bolt 21. passing through anelongated aperture in the plate 20 as shown at 28. Extensions 24 on eachplate 26 are arranged to overlie opposite, arms to hold themsubstantially flush against the plate 20. The purpose of this manner ofmounting the arm to the I reel plate 20 will presently appear. 3

7 structure.

described up to the present time, the several shelves would gravitateand normally remain in a substantially horizontal position, the shafts30 rocking in the apertures during rotation of the reel. However,stabilizing means are provided so that each shelf is positivelypositioned and held from rocking relative to'the reel, except as thereel rotates.

To thisend each shaft 30 is provided with a crank arm as at 34 having abearing pin 35. A stabilizing member 36, which may be of spider formhaving arms 31, is journaled on an eccentric bearing member 38 which maybe fastened to the wall of the oven as shown at 39. The eccentricity ofthe bearing member 38 is substantially equal to the throw ofthe cranks34. The end of. each arm 31 is apertured as at 40 for the reception ofone of the pins 35. There'may be only one of such stabilizing meansprovided which may be at one end of the reel as shown in Fig. 3, whilethe opposite end of the reel, as shown in Fig. 1, may not be equippedwith such stabilizing means, since the'rigidity of the reel may be'suchthat if stabilized at one end the stabilizing effect is sufficient.However, it is within the invention to equip each end of the reel withthis stabilizing As shown herein the eccentric bearing 38 is positionedwith its throw downward (Fig. 3). In the rotation of thereel-thestabilizing spider is caused to rotate upon the eccentric 38 upon whichit freely revolves, and the same positively positionsthe shelves withrespect to the 'reel. Considering Fig. '2, it will be noted that all ofthe shelves remain in a horizontal position and, as shown herein, theshelf supports 33 and the crank arms 34* are generally in parallelism.Considering the uppermost shelf, as shown in Fig. 2, the crank arm 34extends downwardly and is held by the, arm of the stabilizer connectedthereto. Considering that the reel,

as shownin Fig. 2, is rotating counter-clockwise, the eccentricity ofthe bearing 38 has the effectof increasing the distance between thecenter of the shaft I 2 and the aperture 40in the stabilizing 1 arm at arate calculated to correspond to the natural swinging of'the shelf andcrank arm 34 by gravity. This increase continues and is greatest in thelowermost position, as illustrated in Fig. 2. Accordingly, when the reelis rotating the shelves have the appearance of gravitating to ahorizontal position, yet each shelf is individually stabilized andcannot rock 'on the axis of the shaft 30, except as such rocking isnatural- 1y caused by the rotation of the reel. When the reelisstationary each shelf is positively positioned. I 7

When bake goods are placed upon or removed from a shelf in alignmentwith one of the doors as 6, the shelf may be struck or the reel jarredfor one reason or, another, as for example, the

operator may strike the shelf with a loading tool, and when this occurswith the present structure the various shelves are securely held andcannot be jarred into a rocking condition. Likewise any other jar orimpact communicated to the oven or reel or single shelf cannot causerocking of the individual shelves with respect to the reel. Thus thebake goods are not shaken or otherwise disturbed.

Oven reels of the type mentioned herein are rather large, and it issometimes diflicult to get the supporting arms for the shafts 30 intoproper alignment. This difiiculty is experienced in keying the hubs 2|to the shaft l2. If there is only a very slight variation in the keysfor the two hubs 2i, this variation will be multipled several times outon the end of the arms 22, with the result that the shafts 3H and theshelves supported thereby do not lie truly horizontal. It is to rectifythis condition that the adjustment structure shown in Fig. 5 isprovided. Here it will be noted that if the plate 28 is fixedly keyed tothe shaft l2, the arms 22 may be pivoted on the bolts 23. In assemblingthe reel the arms 22 may first be properly positioned by pivotalmovement on the bolts and then the plates are positioned so that theirends lie flush against opposite arms, by adjusting their positionradially and then the bolts 21 are tightened. Both ends of the reel mayembody this adjustable structure, or for that matter only one end mayembody this adjustable structure, as adjustment of one end will sufiiceto bring the shafts 30 into horizontal position, and the invention is tobe construed to cover a reel wherein only one end is thus constructed.

1' claim: I V

1. A reel structure for a bakeoven comprising, a center driving shaft,end plates keyed to the shaft, outwardly extending supporting armscarried by the end plates, shelves swung from the ends of the supportingarms, and means adjustably mounting the supporting arms to one of theend plates whereby the su orting arms maybe brought into correctalignment with the supporting arms on the other end plate.

- 2. A reel structure for a bake oven comprising, a driving shaft, endplates keyed to the driving shaft, supporting arms projecting, radiallyoutwardly from the end plats, shelves for supporting goods to be bakedswung fromthe ends of the supporting arms, means adjustably mounting thesupporting arms to at least one of the end plates, spacer blocks betweenthe supporting arms and said end plate,'said spacer blocks beingadjustably mounted to the end plate by bolt means disposed inapertures'in the end plate and spacer block, and one of said aperturesfor each bolt meansbeing elongated.

3. A reel structure for a bake oven comprising, a driving shaft, endplates keyed to the driving shaft, supporting arms projecting radiallyoutwardly from the end plates, shelves for supporting goods to be bakedswung from the ends of the supporting arms, means securing the inner endof eacharm to at least one supporting plate so that the arms may pivotwith respect thereto,.b0lt means and elongated aperture means connectingintermediate portions of the arms of the said one end plate, spacerblocks between the arms on the said one end plate, and bolt meansextending through apertures in the spacer blocks and the said one endplate for securing the spacer blocks to the said one end plate, and oneof said apertures for each bolt means being elongated.

4. A bake oven structure comprising, walls defining an oven enclosure, ashaft extending across the enclosure, journal means for the shaftcarried by opposite walls, one journal means comprising a block securedto a wall and having an eccentric external bearing surface, a spiderkeyed to the shaft near one end thereof, another spider keyed to theshaft near the opposite end of the shaft, one of said spiders comprisinga plate, radially projecting arms pivotally mounted to the plate,adjustable spacer means between adjacent arms whereby the arms may beangularly adjusted to align them with the opposite spider, a pluralityof shelves, one swingably mounted between each pair of opposite arms onthe two spiders, a crank rigidly associated with ing substantially equalto the eccentricity of the each shelf, and a stabilizing elementrotatably said external bearing surface, and said stabilizmounted on theexternal surface of the bearing ing member holding the several shelvesstabilized member and having a pivotal connection with in the positionto which the shelves gravitate.

5 each of said cranks, the throw of the cranks be- ROBERT PHILIPBOLLING.

